DTC P0A78-113: Drive Motor "A" Inverter Performance [11/2016 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check for DTCs.

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Result	Proceed to
   P0A78-113 is stored before any of the DTCs in the tables below are stored.	A
   Any of the DTCs including pending DTCs in table 1 below are stored before P0A78-113 is stored.	B
   Any of the DTCs including pending DTCs in table 2 below are stored before P0A78-113 is stored.	C

   TABLE 1
   
   

   Relevant DTC
   P0ADB-227	Hybrid Battery Positive Contactor Control Circuit Low
   P0ADC-226	Hybrid Battery Positive Contactor Control Circuit High
   P0ADF-229	Hybrid Battery Negative Contactor Control Circuit Low
   P0AE0-228	Hybrid Battery Negative Contactor Control Circuit High
   P3004-803	High Voltage Power Resource

   TABLE 2
   
   

   Relevant DTC
   P0A9C-123	Hybrid Battery Temperature Sensor "A" Range / Performance
   P0A9D-123	Hybrid Battery Temperature Sensor "A" Circuit Low
   P0A9E-123	Hybrid Battery Temperature Sensor "A" Circuit High
   P0AC0-123	Hybrid Battery Pack Current Sensor Circuit Range / Performance
   P0AC1-123	Hybrid Battery Pack Current Sensor Circuit Low
   P0AC2-123	Hybrid Battery Pack Current Sensor Circuit High
   P0AC6-123	Hybrid Battery Temperature Sensor "B" Range / Performance
   P0AC7-123	Hybrid Battery Temperature Sensor "B" Circuit Low
   P0AC8-123	Hybrid Battery Temperature Sensor "B" Circuit High
   P0ACB-123	Hybrid Battery Temperature Sensor "C" Range / Performance
   P0ACC-123	Hybrid Battery Temperature Sensor "C" Circuit Low
   P0ACD-123	Hybrid Battery Temperature Sensor "C" Circuit High
   P0AE9-123	Hybrid Battery Temperature Sensor "D" Range/Performance
   P0AEA-123	Hybrid Battery Temperature Sensor "D" Circuit Low
   P0AEB-123	Hybrid Battery Temperature Sensor "D" Circuit High
   P0AFC-123	Hybrid Battery Pack Sensor Module
   P0BC3-123	Hybrid Battery Temperature Sensor "E" Range/Performance
   P0BC4-123	Hybrid Battery Temperature Sensor "E" Circuit Low
   P0BC5-123	Hybrid Battery Temperature Sensor "E" Circuit High
   P0C34-123	Hybrid Battery Temperature Sensor "F" Range/Performance
   P0C35-123	Hybrid Battery Temperature Sensor "F" Circuit Low
   P0C36-123	Hybrid Battery Temperature Sensor "F" Circuit High
   P0C6E-123	Hybrid Battery Temperature Sensor "A" / "B" Correlation
   P0C70-123	Hybrid Battery Temperature Sensor "C" / "D" Correlation
   P0C72-123	Hybrid Battery Temperature Sensor "E" / "F" Correlation
   P3011-123, P3012-123, P3013-123, P3014-123, P3015-123, P3016-123, P3017-123, P3018-123, P3019-123, P3020-123, P3021-123, P3022-123, P3023-123, P3024-123, P3025-123	Battery Block # Becomes Weak
   P308A-123	Hybrid Battery Voltage Sensor All Circuits Low

   HINT: 

   • Refer to the freeze frame data to determine the order in which the DTCs were stored.
   • P0A78-113 may be stored due to a malfunction which also causes DTCs in the preceding tables to be stored. In this case, first troubleshoot the output DTCs in the preceding tables. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
5. Turn the power switch off.

Result:  2

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2016 - 10/2017]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2017 - ] 

Result:  3

C 

GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2016 - ] 

Result:  1

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check for DTCs.

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Proceed to
   P0A78-202 is not output.
   P0A78-202 is also output.

   NOTE:

   • If P0A78-202 is output, troubleshoot it first. After completing the troubleshooting for P0A78-202, perform troubleshooting for this DTC.
   • Parts repaired or replaced during troubleshooting for P0A78-202 do not need to be re-inspected in this diagnostic procedure.
5. Turn the power switch off.

Result:  2

P0A78-202 is also output. 

GO TO DTC CHART (P0A78-202). Refer to  DTC P0A78-202: Drive Motor "A" Inverter Performance [11/2016 - ]  

Result:  1

P0A78-202 is not output. 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check for DTCs.

   Powertrain > Hybrid Control > Trouble Codes 

   HINT: 

   • If P0A78-202 was not output in step 2 of this diagnostic procedure, check Table 1 below.
   • If P0A78-202 was output in step 2 of this diagnostic procedure, diagnose that DTC first, then check Table 2 below.

   Result

   Result	Proceed to
   P0A78-113 only is output, or DTCs except the ones in the tables below are also output.	A
   Any of the following DTCs including pending DTCs are also output.	B

   TABLE 1
   
   

   Relevant DTC
   P06B0-163	Sensor Power Supply "A" Circuit / Open
   P06D6-511	Sensor Reference Voltage "F" Circuit / Open
   P06E6-164	Sensor Power Supply "C" Circuit / Open
   P0A1A-151, 166, 517, 658, 791, 809	Generator Control Module
   P0A1B-198, 503, 505, 547, 554, 786, 794, 806	Drive Motor "A" Control Module
   P0A1C-118, 124, 169, 693, 709, 710, 713, 797, 812	Drive Motor "B" Control Module
   P0A1D (all INF codes)*1	Hybrid Powertrain Control Module
   P0A3F-243	Drive Motor "A" Position Sensor Circuit
   P0A40-500, 504, 506, 549, 556, 808	Drive Motor "A" Position Sensor Circuit Range / Performance
   P0A41-245	Drive Motor "A" Position Sensor Circuit Low
   P0A45-669	Drive Motor "B" Position Sensor Circuit
   P0A46-120, 126, 171, 671, 695, 814	Drive Motor "B" Position Sensor Circuit Range / Performance
   P0A47-670	Drive Motor "B" Position Sensor Circuit Low
   P0A4B-253	Generator Position Sensor Circuit
   P0A4C-513, 518, 811	Generator Position Sensor Circuit Range / Performance
   P0A4D-255	Generator Position Sensor Circuit Low
   P0A78-279, 287, 548, 555, 807	Drive Motor "A" Inverter Performance
   P0A79-119, 125, 170, 694, 813	Drive Motor "B" Inverter Performance
   P0A7A-325, 810	Generator Inverter Performance
   P0A90-509	Drive Motor "A" Performance
   P0A91-702	Drive Motor "B" Performance
   P0A92-521	Hybrid Generator Performance
   P0ADB-227	Hybrid Battery Positive Contactor Control Circuit Low
   P0ADC-226	Hybrid Battery Positive Contactor Control Circuit High
   P0ADF-229	Hybrid Battery Negative Contactor Control Circuit Low
   P0AE0-228	Hybrid Battery Negative Contactor Control Circuit High
   P0BEA-290	Drive Motor "A" Phase V Current Sensor Circuit Range / Performance
   P0BEE-298	Drive Motor "A" Phase W Current Sensor Circuit Range / Performance
   P0BF6-683	Drive Motor "B" Phase V Current Sensor Circuit Range / Performance
   P0BFA-685	Drive Motor "B" Phase W Current Sensor Circuit Range / Performance
   P0C19-306	Drive Motor "A" Torque Delivered Performance
   P0C1A-704	Drive Motor "B" Torque Delivered Performance
   P0C76-523	Hybrid Battery System Discharge Time Too Long
   P0CA3-442	DC/DC Converter Step Up Voltage Performance
   P0D2E-586	Drive Motor "A" Inverter Voltage Sensor Circuit Range / Performance
   P0D2F-266	Drive Motor "A" Inverter Voltage Sensor Circuit Low
   P0D30-267	Drive Motor "A" Inverter Voltage Sensor Circuit High
   P0E05-328	Generator Phase V Current Sensor Circuit Range / Performance
   P0E09-336	Generator Phase W Current Sensor Circuit Range / Performance
   P0E32-585	DC/DC Converter Voltage Sensor "A" Range / Performance
   P0E33-589	DC/DC Converter Voltage Sensor "A" Low
   P0E34-590	DC/DC Converter Voltage Sensor "A" High
   P0E71-344	Generator Torque Delivered Performance
   P1C2A-155	Generator A/D Converter Circuit
   P1C2B-192	Drive Motor "A" A/D Converter Circuit
   P1C2C-706	Drive Motor "B" A/D Converter Circuit
   P1C2D-587	Hybrid Battery Voltage / DC/DC Converter Voltage Correlation
   P1C3C-294	Drive Motor "A" Phase V Current Sensor Correlation
   P1C3D-302	Drive Motor "A" Phase W Current Sensor Correlation
   P1C3E-333	Generator Phase V Current Sensor Correlation
   P1C3F-341	Generator Phase W Current Sensor Correlation
   P1C4A-288	Drive Motor "A" Phase V Current Sensor Sub Circuit Range / Performance
   P1C4F-296	Drive Motor "A" Phase W Current Sensor Sub Circuit Range / Performance
   P1C54-326	Generator Phase V Current Sensor Sub Circuit Range / Performance
   P1C59-334	Generator Phase W Current Sensor Sub Circuit Range / Performance
   P1C6D-501	Drive Motor "A" Phase V Current Sensor Offset Range / Performance
   P1C6E-502	Drive Motor "A" Phase W Current Sensor Offset Range / Performance
   P1C6F-688	Drive Motor "B" Phase V Current Sensor Offset Range / Performance
   P1C70-689	Drive Motor "B" Phase W Current Sensor Offset Range / Performance
   P1C71-515	Generator Phase V Current Sensor Offset Range / Performance
   P1C72-516	Generator Phase W Current Sensor Offset Range / Performance
   P1C73-512	Sensor Standard Voltage "F" Circuit / Open
   P1CA6-156	Generator Control Module Malfunction
   P1CA7-193	Drive Motor Control Module Malfunction
   P1CA8-708	Drive Motor "B" Control Module Malfunction
   P1CAC-200	Generator Position Sensor Angle Malfunction
   P1CAD-168	Drive Motor "A" Position Sensor Angle Malfunction
   P1CAE-715	Drive Motor "B" Position Sensor Angle Malfunction
   P1CAF-792	Generator Position Sensor REF Signal Cycle Malfunction
   P1CB0-795	Drive Motor "A" Position Sensor REF Signal Cycle Malfunction
   P1CB1-798	Drive Motor "B" Position Sensor REF Signal Cycle Malfunction
   P1CB2-793	Generator Position Sensor REF Signal Stop Malfunction
   P1CB3-796	Drive Motor "A" Position Sensor REF Signal Stop Malfunction
   P1CB4-799	Drive Motor "B" Position Sensor REF Signal Stop Malfunction
   P3004-803	High Voltage Power Resource
   P3133-659	Communication Error from Generator to Drive Motor "A"
   P3134-661	Communication Error from Drive Motor "A" to Generator
   P33C1-684	Drive Motor "B" Phase V Current Sensor Sub Circuit Range / Performance
   P33C6-686	Drive Motor "B" Phase W Current Sensor Sub Circuit Range / Performance
   P33D8-677	Drive Motor "B" Phase V Current Sensor Correlation
   P33D9-678	Drive Motor "B" Phase W Current Sensor Correlation

   TABLE 2
   
   

   Relevant DTC
   P06B0-163	Sensor Power Supply "A" Circuit / Open
   P06D6-511	Sensor Reference Voltage "F" Circuit / Open
   P06E6-164	Sensor Power Supply "C" Circuit / Open
   P0A1A-151, 166, 517, 658, 791, 809	Generator Control Module
   P0A1B-198, 503, 505, 547, 554, 786, 794, 806	Drive Motor "A" Control Module
   P0A1C-118, 124, 169, 693, 709, 710, 713, 797, 812	Drive Motor "B" Control Module
   P0A1D (all INF codes)*1	Hybrid Powertrain Control Module
   P0A3F-243	Drive Motor "A" Position Sensor Circuit
   P0A40-500, 504, 506, 549, 556, 808	Drive Motor "A" Position Sensor Circuit Range / Performance
   P0A41-245	Drive Motor "A" Position Sensor Circuit Low
   P0A45-669	Drive Motor "B" Position Sensor Circuit
   P0A46-120, 126, 171, 671, 695, 814	Drive Motor "B" Position Sensor Circuit Range / Performance
   P0A47-670	Drive Motor "B" Position Sensor Circuit Low
   P0A4B-253	Generator Position Sensor Circuit
   P0A4C-513, 518, 811	Generator Position Sensor Circuit Range / Performance
   P0A4D-255	Generator Position Sensor Circuit Low
   P0A78-279, 287, 548, 555, 807	Drive Motor "A" Inverter Performance
   P0A79-119, 125, 170, 694, 813	Drive Motor "B" Inverter Performance
   P0A7A-325, 810	Generator Inverter Performance
   P0A91-702	Drive Motor "B" Performance
   P0A92-521	Hybrid Generator Performance
   P0ADB-227	Hybrid Battery Positive Contactor Control Circuit Low
   P0ADC-226	Hybrid Battery Positive Contactor Control Circuit High
   P0ADF-229	Hybrid Battery Negative Contactor Control Circuit Low
   P0AE0-228	Hybrid Battery Negative Contactor Control Circuit High
   P0BF6-683	Drive Motor "B" Phase V Current Sensor Circuit Range / Performance
   P0BFA-685	Drive Motor "B" Phase W Current Sensor Circuit Range / Performance
   P0C1A-704	Drive Motor "B" Torque Delivered Performance
   P0C76-523	Hybrid Battery System Discharge Time Too Long
   P0CA3-442	DC/DC Converter Step Up Voltage Performance
   P0D2E-586	Drive Motor "A" Inverter Voltage Sensor Circuit Range / Performance
   P0D2F-266	Drive Motor "A" Inverter Voltage Sensor Circuit Low
   P0D30-267	Drive Motor "A" Inverter Voltage Sensor Circuit High
   P0E05-328	Generator Phase V Current Sensor Circuit Range / Performance
   P0E09-336	Generator Phase W Current Sensor Circuit Range / Performance
   P0E32-585	DC/DC Converter Voltage Sensor "A" Range / Performance
   P0E33-589	DC/DC Converter Voltage Sensor "A" Low
   P0E34-590	DC/DC Converter Voltage Sensor "A" High
   P0E71-344	Generator Torque Delivered Performance
   P1C2A-155	Generator A/D Converter Circuit
   P1C2B-192	Drive Motor "A" A/D Converter Circuit
   P1C2C-706	Drive Motor "B" A/D Converter Circuit
   P1C2D-587	Hybrid Battery Voltage / DC/DC Converter Voltage Correlation
   P1C3C-294	Drive Motor "A" Phase V Current Sensor Correlation
   P1C3D-302	Drive Motor "A" Phase W Current Sensor Correlation
   P1C3E-333	Generator Phase V Current Sensor Correlation
   P1C3F-341	Generator Phase W Current Sensor Correlation
   P1C54-326	Generator Phase V Current Sensor Sub Circuit Range / Performance
   P1C59-334	Generator Phase W Current Sensor Sub Circuit Range / Performance
   P1C6F-688	Drive Motor "B" Phase V Current Sensor Offset Range / Performance
   P1C70-689	Drive Motor "B" Phase W Current Sensor Offset Range / Performance
   P1C71-515	Generator Phase V Current Sensor Offset Range / Performance
   P1C72-516	Generator Phase W Current Sensor Offset Range / Performance
   P1C73-512	Sensor Standard Voltage "F" Circuit / Open
   P1CA6-156	Generator Control Module Malfunction
   P1CA7-193	Drive Motor Control Module Malfunction
   P1CA8-708	Drive Motor "B" Control Module Malfunction
   P1CAC-200	Generator Position Sensor Angle Malfunction
   P1CAD-168	Drive Motor "A" Position Sensor Angle Malfunction
   P1CAE-715	Drive Motor "B" Position Sensor Angle Malfunction
   P1CAF-792	Generator Position Sensor REF Signal Cycle Malfunction
   P1CB0-795	Drive Motor "A" Position Sensor REF Signal Cycle Malfunction
   P1CB1-798	Drive Motor "B" Position Sensor REF Signal Cycle Malfunction
   P1CB2-793	Generator Position Sensor REF Signal Stop Malfunction
   P1CB3-796	Drive Motor "A" Position Sensor REF Signal Stop Malfunction
   P1CB4-799	Drive Motor "B" Position Sensor REF Signal Stop Malfunction
   P3004-803	High Voltage Power Resource
   P3133-659	Communication Error from Generator to Drive Motor "A"
   P3134-661	Communication Error from Drive Motor "A" to Generator
   P33C1-684	Drive Motor "B" Phase V Current Sensor Sub Circuit Range / Performance
   P33C6-686	Drive Motor "B" Phase W Current Sensor Sub Circuit Range / Performance
   P33D8-677	Drive Motor "B" Phase V Current Sensor Correlation
   P33D9-678	Drive Motor "B" Phase W Current Sensor Correlation

   HINT: 

   • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
   • P0A78-113 may be stored due to a malfunction which also causes DTCs in the preceding tables to be stored. In this case, first troubleshoot the output DTCs in the preceding tables. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
5. Turn the power switch off.

Result:  2

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2016 - 10/2017]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2017 - ] 

Result:  1

A 

See step  4

Refer to PROCEDURE - Step 3

Result

Result:  2

B 

CONNECT SECURELY 

Result:  3

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

A 

See step  5

Refer to PROCEDURE - Step 3 Refer to PROCEDURE - Step 3

Result

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  6

Refer to PROCEDURE - Step 4 Refer to PROCEDURE - Step 4

Result

Result:  2

NG 

See step  24

Result:  1

OK 

See step  7

Refer to PROCEDURE - Step 5 Refer to PROCEDURE - Step 5

Result

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  8

Refer to PROCEDURE - Step 6 Refer to PROCEDURE - Step 6

Result

Result:  2

NG 

See step  22

Result:  1

OK 

See step  9

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the inverter terminal cover from the inverter with converter assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Check that the bolts for the generator cable are tightened to the specified torque, the generator cable is connected securely, and there are no contact problems.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Specified Condition

   T = 8.0 N*m (82 kgf*cm, 71 in.*lbf)

   NOTE:

   Make sure that the tightening torque of the bolt is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

4. Disconnect the generator cable from the inverter with converter assembly.
5. Check for arc marks at the terminals for the generator cable.

   Result

   Result		Proceed to
   The terminals are connected securely and there are no contact problems.	There are no arc marks.	A
   The terminals are not connected securely and there is a contact problem.	There are arc marks.	B
   The terminals are not connected securely and there is a contact problem.	There are no arc marks.	C
   The terminals are connected securely and there are no contact problems.	There are arc marks.	B

6. Connect the generator cable to the inverter with converter assembly.
7. Install the inverter terminal cover.

Result:  2

B 

REPLACE MALFUNCTIONING PARTS 

Result:  3

C 

CONNECT SECURELY 

Result:  1

A 

See step  10

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the inverter terminal cover from the inverter with converter assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Check that the bolts for the motor cable are tightened to the specified torque, the motor cable is connected securely, and there are no contact problems.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Specified Condition

   T = 8.0 N*m (82 kgf*cm, 71 in.*lbf)

   NOTE:

   Make sure that the tightening torque of the bolt is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

4. Disconnect the motor cable from the inverter with converter assembly.
5. Check for arc marks at the terminals for the motor cable.

   Result

   Result		Proceed to
   The terminals are connected securely and there are no contact problems.	There are no arc marks.	A
   The terminals are not connected securely and there is a contact problem.	There are arc marks.	B
   The terminals are not connected securely and there is a contact problem.	There are no arc marks.	C
   The terminals are connected securely and there are no contact problems.	There are arc marks.	B

6. Connect the motor cable to the inverter with converter assembly.
7. Install the inverter terminal cover.

Result:  2

B 

REPLACE MALFUNCTIONING PARTS 

Result:  3

C 

CONNECT SECURELY 

Result:  1

A 

See step  11

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the inverter terminal cover from the inverter with converter assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Disconnect the generator cable and motor cable from the inverter with converter assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Motor Cable
   *2	Generator Cable

4. Check the generator (MG1) for an interphase short using a milliohmmeter.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Shield Ground
   *a	Generator Cable (Inverter with Converter Assembly Side)

   1. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

      HINT: 

      If the generator (MG1) temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      s2-3 (U) -s2-2 (V)	Power switch off	37 to 43 mΩ
      s2-2 (V) - s2-1 (W)	Power switch off	36 to 42 mΩ
      s2-1 (W) - s2-3 (U)	Power switch off	36 to 42 mΩ

      HINT: 

      To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68°F).

      R20 = Rt / {1 + 0.00393 X (T - 20)}

      The calculation is based on the following:

      R20: Resistance at 20°C (68°F) (mΩ)

      Rt: Measured resistance (mΩ)

      T: Temperature when the resistance is measured (°C (°F).)

5. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.
   NOTE:

   Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   s2-3 (U) - Body ground and shield ground	Power switch off	100 MΩ or higher
   s2-2 (V) - Body ground and shield ground	Power switch off	100 MΩ or higher
   s2-1 (W) - Body ground and shield ground	Power switch off	100 MΩ or higher

6. Reconnect the generator cable and motor cable.
7. Install the inverter terminal cover.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

Result:  1

OK 

See step  12

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the inverter terminal cover from the inverter with converter assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Disconnect the generator cable and motor cable from the inverter with converter assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Generator Cable
   *2	Motor Cable

4. Check the motor (MG2) for an interphase short using a milliohmmeter.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Shield Ground
   *a	Motor Cable (Inverter with Converter Assembly Side)

   1. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

      HINT: 

      If the motor (MG2) temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      r2-3 (U) - r2-2 (V)	Power switch off	52 to 60 mΩ
      r2-2 (V) - r2-1 (W)	Power switch off	50 to 58 mΩ
      r2-1 (W) - r2-3 (U)	Power switch off	50 to 58 mΩ

      HINT: 

      To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68°F).

      R20 = Rt / {1 + 0.00393 X (T - 20)}

      The calculation is based on the following:

      R20: Resistance at 20°C (68°F) (mΩ)

      Rt: Measured resistance (mΩ)

      T: Temperature when the resistance is measured (°C (°F).)

5. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.
   NOTE:

   Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   r2-3 (U) - Body ground and shield ground	Power switch off	100 MΩ or higher
   r2-2 (V) - Body ground and shield ground	Power switch off	100 MΩ or higher
   r2-1 (W) - Body ground and shield ground	Power switch off	100 MΩ or higher

6. Reconnect the generator cable and motor cable.
7. Install the inverter terminal cover.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

Result:  1

OK 

See step  13

1. Remove the PCU fuse from the No. 3 engine room relay block.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	No. 3 Engine Room Relay Block
   *2	PCU Fuse

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   PCU fuse terminal	Always	Below 1 Ω

3. Install the PCU fuse.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

See step  19

Result:  1

OK 

See step  14

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

2. Disconnect the A46 inverter with converter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Inverter with Converter Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A46-10 (GND1) - Body ground	Power switch off	Below 1 Ω
   A46-11 (GND2) - Body ground	Power switch off	Below 1 Ω

4. Connect the cable to the negative (-) auxiliary battery terminal.
5. Turn the power switch on (IG).
6. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A46-30 (+B) - Body ground	Power switch on (IG)	Same as auxiliary battery voltage
   A46-31 (+B2) - Body ground	Power switch on (IG)	Same as auxiliary battery voltage

   NOTE:

   Turning the power switch on (IG) with the inverter with converter assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

7. Turn the power switch off.
8. Disconnect the cable from the negative (-) auxiliary battery terminal.
9. Reconnect the A46 inverter with converter assembly connector.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE POWER SOURCE CIRCUIT 

Result:  1

OK 

See step  15

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

2. Disconnect the A86 hybrid vehicle control ECU assembly connector.
3. Disconnect the A46 inverter with converter assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Rear view of wire harness connector (to Hybrid Vehicle Control ECU Assembly)
   *b	Front view of wire harness connector (to Inverter with Converter Assembly)

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   A46-9 (HTM+) - A86-24 (HTM+)	Power switch off	Below 1 Ω
   A46-20 (HTM-) - A86-25 (HTM-)	Power switch off	Below 1 Ω
   A46-8 (MTH+) - A86-23 (MTH+)	Power switch off	Below 1 Ω
   A46-19 (MTH-) - A86-22 (MTH-)	Power switch off	Below 1 Ω
   A46-26 (REQ+) - A86-31 (REQ+)	Power switch off	Below 1 Ω
   A46-37 (REQ-) - A86-30 (REQ-)	Power switch off	Below 1 Ω
   A46-7 (CLK+) - A86-33 (CLK+)	Power switch off	Below 1 Ω
   A46-18 (CLK-) - A86-32 (CLK-)	Power switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   A46-9 (HTM+) or A86-24 (HTM+) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A46-20 (HTM-) or A86-25 (HTM-) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A46-8 (MTH+) or A86-23 (MTH+) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A46-19 (MTH-) or A86-22 (MTH-) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A46-26 (REQ+) or A86-31 (REQ+) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A46-37 (REQ-) or A86-30 (REQ-) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A46-7 (CLK+) or A86-33 (CLK+) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A46-18 (CLK-) or A86-32 (CLK-) - Body ground and other terminals	Power switch off	10 kΩ or higher

5. Connect the cable to the negative (-) auxiliary battery terminal.
6. Turn the power switch on (IG).
7. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A46-9 (HTM+) or A86-24 (HTM+) - Body ground	Power switch on (IG)	Below 1 V
   A46-20 (HTM-) or A86-25 (HTM-) - Body ground	Power switch on (IG)	Below 1 V
   A46-8 (MTH+) or A86-23 (MTH+) - Body ground	Power switch on (IG)	Below 1 V
   A46-19 (MTH-) or A86-22 (MTH-) - Body ground	Power switch on (IG)	Below 1 V
   A46-26 (REQ+) or A86-31 (REQ+) - Body ground	Power switch on (IG)	Below 1 V
   A46-37 (REQ-) or A86-30 (REQ-) - Body ground	Power switch on (IG)	Below 1 V
   A46-7 (CLK+) or A86-33 (CLK+) - Body ground	Power switch on (IG)	Below 1 V
   A46-18 (CLK-) or A86-32 (CLK-) - Body ground	Power switch on (IG)	Below 1 V

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU assembly and inverter with converter assembly connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

8. Turn the power switch off.
9. Disconnect the cable from the negative (-) auxiliary battery terminal.
10. Reconnect the A46 inverter with converter assembly connector.
11. Reconnect the A86 hybrid vehicle control ECU assembly connector.

    Result

    Proceed to
    OK
    NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  16

1. Disconnect the A86 hybrid vehicle control ECU assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Hybrid Vehicle Control ECU Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A86-24 (HTM+) - A86-25 (HTM-)	Power switch off	80 to 170 Ω
   A86-23 (MTH+) - A86-22 (MTH-)	Power switch off	80 to 170 Ω
   A86-31 (REQ+) - A86-30 (REQ-)	Power switch off	80 to 170 Ω
   A86-33 (CLK+) - A86-32 (CLK-)	Power switch off	80 to 170 Ω

3. Reconnect the A86 hybrid vehicle control ECU assembly connector.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

Result:  1

OK 

See step  17

Refer to PROCEDURE - Step 9 Refer to PROCEDURE - Step 9

Result

Result:  2

B 

CONNECT SECURELY 

Result:  3

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

A 

See step  18

Refer to PROCEDURE - Step 10 Refer to PROCEDURE - Step 10

Result

Result:  1

A 

REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

Result:  2

B 

CONNECT SECURELY 

Result:  3

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

2. Disconnect the A46 inverter with converter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Inverter with Converter Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A46-30 (+B) - Body ground	Power switch off	10 kΩ or higher
   A46-31 (+B2) - Body ground	Power switch off	10 kΩ or higher

4. Reconnect the A46 inverter with converter assembly connector.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

See step  21

Result:  1

OK 

See step  20

Refer to COMPONENTS [11/2016 - ]

Result

Result:  1

NEXT 

REPLACE FUSE (PCU) 

Result

Result:  1

NEXT 

REPLACE FUSE (PCU) 

Refer to PROCEDURE - Step 14 Refer to PROCEDURE - Step 14

Result

Result:  2

B 

CONNECT SECURELY 

Result:  3

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

A 

See step  23

Refer to PROCEDURE - Step 15 Refer to PROCEDURE - Step 15

Result

Result:  1

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  2

NG 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

Refer to PROCEDURE - Step 16 Refer to PROCEDURE - Step 16

Result

Result:  2

B 

CONNECT SECURELY 

Result:  3

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

A 

See step  25

Refer to PROCEDURE - Step 17 Refer to PROCEDURE - Step 17

Result

Result:  1

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  2

NG 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  COMPONENTS [11/2016 - ]